body {
  margin: 0;
  padding: 0;
}

.main {
  /* border: 1px solid rebeccapurple; */
  margin: 100px 100px 100px 100px;
  position: relative;
}

.main-item {
  display: flow-root;
}

.row {
  border: 1px solid rebeccapurple;
  height: 70px;
  width: 900px;
}

.clo {
  display: block;
  width: 88px;
  border-right: 2px solid rebeccapurple;
  border-top: 0;
  border-bottom: 0;
  height: 70px;
  text-align: center;
  line-height: 70px;
  float: left;
  padding: 0px;
  font-size: 18px;
}

/* .clo:last-child {
    border-right: 0;
}

.clo:first-child {
    border-left: 0;
} */


.main-first {
    display: inline-block;

}
.main-last {
  display: inline-block;
  border: 2px solid salmon;
  width: 350px;
    position: absolute;
    margin-left: 20px;
}

.main-last>.top {
    height: 300px;
    border-bottom: 1px solid salmon;
}

.main-last>.bottom {
    height: 70px;
    width: 100%;
}
.main-last>.bottom>button{
    width: 100px;
    height: 40px;
    margin: 10px 25px;
    display: inline-flex;
    justify-content: center;
    /* background: hsl(150, 50%, 20%); */
    flex-wrap: nowrap;
    align-items: center;
    flex-direction: row;
    border-radius:5px;
}

.bottom {
    width: 100px;
    height: 30px;
    padding: 10px 20px;
}
#startBtn {
    background-color: aquamarine;
}

#endBtn {
    background-color: cadetblue;
    color: white;
}
